CN215180981U - Circular polarizer and display module - Google Patents
Circular polarizer and display module Download PDFInfo
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- CN215180981U CN215180981U CN202121389888.4U CN202121389888U CN215180981U CN 215180981 U CN215180981 U CN 215180981U CN 202121389888 U CN202121389888 U CN 202121389888U CN 215180981 U CN215180981 U CN 215180981U
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Abstract
The application relates to a round polaroid and contain display module assembly of round skin polaroid. Specifically, the circular polarizer comprises a hole area, a first area and a second area, wherein the first area at least partially surrounds the hole area, the second area at least partially surrounds the first area, the circular polarizer further comprises a first adhesive layer, a phase difference film layer and a second adhesive layer which are stacked, the phase difference film layer is located in the second area, the first adhesive layer and the second adhesive layer are located in the first area and the second area, and the first adhesive layer and the second adhesive layer are bonded in the first area and wrap the side face, facing the first area, of the phase difference film layer. The method and the device can avoid the condition that micro cracks on the phase difference film slotting edge of the circular polaroid deteriorate and extend due to OCR corrosion.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a circle polaroid and display module assembly.
Background
In order to reduce the influence of ambient light on the display of the device, a circular polarizer is usually attached to the outer layer of the OLED device to reduce glare and improve the display contrast.
However, in the under-screen imaging technology, the transmittance of the transparent display area is reduced due to the presence of the circular polarizer. The current method comprises the following steps: and (3) grooving the circular polarizer at the position of the camera hole, and filling the thickness difference between the grooved area of the circular polarizer and the area of the grooved area by using OCR (Optical Clear Resin). But OCR is acidic and easily corrodes the POL slot around. After OCR corrosion, microcracks at the slotted edge of the phase difference film of the circular polarizer are easy to deteriorate and extend, and finally large visible cracks are formed.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a circular polarizer and a display module, which can avoid the situation of microcracks at the edge of a phase difference film slot of the circular polarizer deteriorating and extending due to OCR corrosion.
A circular polarizer comprising an aperture region, a first region at least partially surrounding the aperture region, and a second region at least partially surrounding the first region,
the circular polarizer also comprises a first adhesive layer, a phase difference film layer and a second adhesive layer which are arranged in a laminating way,
the phase difference film layer is positioned in the second area,
the first adhesive layer and the second adhesive layer are located in a first region and a second region,
the phase difference film layer is located in the second area, and the side face, facing the first area, of the phase difference film layer is coated by at least one of the first adhesive layer and the second adhesive layer.
And the first adhesive layer and the second adhesive layer are bonded in a first area and wrap the side face, facing the first area, of the phase difference film layer.
Preferably, the retardation film layer comprises a first sub retardation film layer and a second sub retardation film layer;
a third adhesive layer is arranged between the first sub-phase difference film layer and the second sub-phase difference film layer,
the first adhesive layer, the second adhesive layer and the third adhesive layer coat the side faces, facing the first region, of the first sub-phase difference film layer and the side faces, facing the second region, of the second sub-phase difference film layer.
Preferably, the first adhesive layer and/or the second adhesive layer and/or the third adhesive layer is a pressure-sensitive adhesive layer.
Preferably, the circular polarizer further includes a polarizing functional layer,
the polarized light functional layer is positioned on one side of the first adhesive layer, which is far away from the phase difference film layer.
Preferably, the circular polarizer further includes a surface hardening layer,
the surface hardening layer is positioned on one side of the polarized light functional layer far away from the first adhesive layer.
Preferably, the circular polarizer further comprises a protective film and/or a release film,
the protective film is positioned on one side of the surface hardening layer far away from the polarized light functional layer,
the release film is positioned on one side of the second adhesive layer far away from the phase difference film layer.
The application also provides a display module, which comprises the circular polarizer and the display panel,
the circular polaroid is positioned on the light emitting side of the display panel.
Preferably, the display panel includes a first display area and a functional area, the display area at least partially surrounds the functional area,
wherein, the hole area of the circular polarizer is positioned in the functional area in the orthographic projection of the display panel.
Preferably, a transparent filler is arranged in the hole area.
Preferably, the transparent filler is OCR.
The circular polaroid and the display module comprising the same have the advantages that the phase difference film layer on the periphery of the hole area is retracted relative to other adjacent film layers, and the periphery of the phase difference film groove is surrounded by the first adhesive layer and the second adhesive layer. The phase difference film around the opening area and the acidic substance filling the opening area are isolated by the first adhesive layer and the second adhesive layer which are positioned in the first area, so that the phase difference film around the slotted area of the circular polarizer can be effectively prevented from being corroded by the acidic substance, and microcracks of the phase difference film, which are caused by die cutting, can not be deteriorated into large visible cracks.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a circular polarizer according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a circular polarizer according to another embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a display module according to an embodiment of the present application.
Description of reference numerals:
100-circular polarizer, 101-hole area, 102-first area, 103-second area, 10-first adhesive layer, 20-phase difference film layer, 21-first sub-phase difference film layer, 22-second sub-phase difference film layer, 30-second adhesive layer, 40-third adhesive layer, 50-polarizing function layer, 60-surface hardening layer, 70-protective film, 80-release film, 200-display panel, 201-first display area and 202-function area.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technology of making a video recording under the screen all the time is one of the important development trends of display, and display module assembly need reserve a transparent hole, sets up a transparent display area promptly, sets up leading camera below transparent display area and makes a video recording. In order to reduce the influence of ambient light on the display of the device, a circular polarizer is usually attached to the outer layer of the OLED device. However, the circular polarizers in each stack of the display module are not transparent, which severely reduces the light transmittance of the transparent display area. In order to improve the transmittance of the transparent display area in the prior art, the current method is to perform a slotting process on the circular polarizer of the transparent display area, and then fill the thickness difference between the slotted area of the circular polarizer and the area of the slotted area of the circular polarizer with OCR glue. But the OCR glue is acidic and is easy to corrode the periphery of the slot of the circular polarizer. And because the slotting edge of the circular polarizer has microcracks after punching, and the phase difference film in the circular polarizer material is not acid-resistant, the microcracks at the slotting edge of the phase difference film are easy to deteriorate and extend after OCR corrosion, and finally large visible cracks are formed.
Therefore, how to improve the situation that the phase difference film of the circular polarizer causes microcracks at the edges of the slots to deteriorate and extend due to OCR corrosion is an urgent problem to be solved in the under-screen imaging technology.
In order to solve the above problems, i.e. to improve the situation that the micro-cracks at the edge of the slot are aggravated and extended due to the fact that OCR corrodes the phase difference film of the circular polarizer, the applicant proposes the application.
The present application provides a circular polarizer, which can be applied to a display module, wherein the display module can include an Organic Light Emitting Diode (OLED) display panel.
Specifically, the circular polarizer comprises an aperture area 101, a first area 102 and a second area 103, wherein the first area 102 at least partially surrounds the aperture area 101, the second area 103 at least partially surrounds the first area 102,
the circular polarizer further comprises a first adhesive layer 10, a phase difference film layer 20 and a second adhesive layer 30 which are stacked,
the first adhesive layer 10 and the second adhesive layer 30 are located in a first area 102 and a second area 103,
the retardation film layer 20 is located in the second region 103, and a side of the retardation film layer 20 facing the first region 102 is covered by at least one of the first adhesive layer 10 and the second adhesive layer 30.
The application also provides a display module, including foretell circular polarizer 100 and display panel 200, circular polarizer 100 is located display panel 200's the light-emitting side.
The circular polarizer and the display module according to the embodiments of the present application may be presented in various forms, and some examples of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a circular polarizer according to the present embodiment, and the schematic structural diagram shows a cross-sectional structure of the circular polarizer. Specifically, the circular polarizer has an aperture region 101, a first region 102 and a second region 103, wherein the first region 102 at least partially surrounds the aperture region 101, and the second region 103 at least partially surrounds the first region 102. The circular polarizer further comprises a first adhesive layer 10, a phase difference film layer 20 and a second adhesive layer 30 which are sequentially stacked, wherein the first adhesive layer 10 and the second adhesive layer 30 are both positioned in a first area 102 and a second area 103, the phase difference film layer 20 is positioned in the second area 103, and the side surface, facing the first area 102, of the phase difference film layer 20 is coated by at least one of the first adhesive layer 10 and the second adhesive layer 30.
Alternatively, the side of the phase difference film layer 20 facing the first region 102 may be covered by the first adhesive layer 10, may be covered by the second adhesive layer 30, but may be covered by both the first adhesive layer 10 and the second adhesive layer 30.
In this embodiment, the side of the phase difference film layer 20 facing the first region 102 is covered by the first adhesive layer 10 and the second adhesive layer 30. Specifically, referring to fig. 1, the first adhesive layer 10 and the second adhesive layer 30 are bonded in a first region and cover a side surface of the retardation film layer 20 facing the first region 102.
With the increasing requirements of people on display panels, comprehensive screens are produced. In order to realize full-screen display, that is, full display of the surface of the display panel, a camera is usually arranged below the screen of the existing display device, and the function of a front camera is realized through a camera module under the screen. Therefore, the under-screen imaging technology requires high light transmittance. However, the circular polarizer is opaque, so that the light transmittance of the area of the camera under the screen is reduced. The current method is to perform slotting processing on the circular polarizer in the area of the camera under the screen, improve the light transmittance of the area of the camera under the screen, namely the transparent display area, and fill the slotting area of the circular polarizer with the transparent optical cement OCR. Because the phase difference film layer in the circular polarizer material is not acid-resistant, microcracks at the edge of the phase difference film slot are easy to deteriorate and extend after OCR corrosion, and finally visible large cracks are formed, so that the practical efficiency is influenced.
In the circular polarizer of this embodiment, the retardation film layer 20 is located in the second region 103, the first adhesive layer 10 and the second adhesive layer 30 are located in the first region 102 and the second region 103, and the first adhesive layer 10 and the second adhesive layer 30 are bonded in the first region and wrap the side of the retardation film layer 20 facing the first region 102. Namely, the retardation film layer 20 around the hole region 101 is retracted relative to the adjacent other film layers (the first adhesive layer 10 and the second adhesive layer 30), and the first adhesive layer 10 and the second adhesive layer 30 surround the periphery of the slit of the retardation film. The phase difference film around the hole region and the OCR filling the hole region are isolated by the first adhesive layer 10 and the second adhesive layer 30 which are positioned in the first region 102, so that the phase difference film around the slotted region of the circular polarizer can be effectively prevented from being corroded by the OCR, and the phase difference film is prevented from being deteriorated into large cracks which can be seen visually due to the microcracks of the phase difference film caused by die cutting.
In one embodiment of the present disclosure, the first adhesive layer 10 and/or the second adhesive layer 30 are pressure-sensitive adhesive layers, and the retardation film layer 20 of the circular polarizer is bonded to other films of the circular polarizer through the pressure-sensitive adhesive layers. Specifically, the first adhesive layer 10 may be a pressure-sensitive adhesive layer, the second adhesive layer 30 may also be a pressure-sensitive adhesive layer, and of course, both the first adhesive layer 10 and the second adhesive layer 30 may be pressure-sensitive adhesive layers. Alternatively, the first adhesive layer 10 and the second adhesive layer 30 may have a single-layer structure, or may have a structure including at least two layers. The thicknesses of the first adhesive layer 10 and the second adhesive layer 30 may be appropriately set according to the intended use, adhesive strength, and the like. And any suitable pressure sensitive adhesive may be used to form the pressure sensitive adhesive layer. Specifically, the pressure-sensitive adhesive layer may include, but is not limited to, solvent-based pressure-sensitive adhesives, non-aqueous emulsion-based pressure-sensitive adhesives, aqueous pressure-sensitive adhesives, and hot melt pressure-sensitive adhesives.
Note that the circular polarizer described herein further includes a polarizing functional layer 50. The polarizing functional layer 50 is located on a side of the first adhesive layer 10 away from the retardation film layer 20. Optionally, the polarization functional layer 50 is a linear polarizer. The linear polarizer and the phase difference film layer together reduce the influence of ambient light on the display of the device. Specifically, when the circular polarizer is applied to the display module, the polarizing function layer 50 is disposed on one side of the retardation film layer 20, which is far away from the display panel 200 of the display module. That is, in the display module, the positional relationship among the polarized light functional layer 50, the retardation film layer 20, and the display panel 200 is from bottom to top, and the display panel 200, the retardation film layer 20, and the polarized light functional layer 50 are sequentially stacked.
In one embodiment of the present application, the circular polarizer further includes a surface hardening layer 60, and the surface hardening layer 60 is located on a side of the polarizing function layer 50 away from the first adhesive layer 10. Specifically, the surface hardening layer 60 may be disposed on a side of the polarization function layer 50 away from the first adhesive layer 10 by coating, so as to further optimize the performance of the circular polarizer.
In order to ensure that the circular polarizer is not scratched, in other embodiments of the present application, the circular polarizer further includes a protective film 70 and/or a release film 80. Specifically, the protective film 70 is located on a side of the surface hardening layer 60 away from the polarized functional layer 50, and the release film 80 is located on a side of the second adhesive layer 30 away from the retardation film layer 20. The circular polarizer may include one or both of the protective film 70 and the release film 80.
In one embodiment of the present application, the retardation film layer 20 is provided as a multi-layer structure. Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a circular polarizer according to another embodiment of the present application, where the schematic structural diagram shows another cross-sectional structure of the circular polarizer. Specifically, in this embodiment, the retardation film layer 20 includes a first sub-retardation film layer 21 and a second sub-retardation film layer 22; a third adhesive layer 40 is further included between the first sub-phase difference film layer 21 and the second sub-phase difference film layer 22, wherein the first adhesive layer 10, the second adhesive layer 30, and the third adhesive layer 40 coat the side faces, facing the first region 102, of the first sub-phase difference film layer 21 and the second sub-phase difference film layer 22, that is, the first adhesive layer 10, the second adhesive layer 30, and the third adhesive layer 40 surround the side faces, facing the hole region, of the first sub-phase difference film layer 21 and the second sub-phase difference film layer 22, so that acidic substances in the hole region are prevented from corroding the first sub-phase difference film layer 21 and the second sub-phase difference film layer 22, and further, the occurrence of a large crack condition that microcracks of the die-cut phase difference film are deteriorated to be visible is avoided.
Referring to fig. 3, the present embodiment further provides a display module. Fig. 3 is a schematic structural diagram of a display module provided in this embodiment, and the diagram illustrates a cross-sectional structure of the display module provided in this embodiment. Specifically, the display module includes the circular polarizer 100 and the display panel 200. Specifically, the display panel 200 may be an OLED display panel, and optionally, the OLED display panel includes a substrate, a driving circuit layer, and an OLED device layer, which are stacked. The circular polarizer 100 is located at the light emitting side of the display panel 200. The circular polarizer 100 comprises a hole area 101, a first area 102 and a second area 103, wherein the first area 102 at least partially surrounds the hole area 101, the second area 103 at least partially surrounds the first area 102, the circular polarizer further comprises a first adhesive layer 10, a phase difference film layer 20 and a second adhesive layer 30 which are stacked, the phase difference film layer 20 is located in the second area 103, and the first adhesive layer 10 and the second adhesive layer 30 are located in the first area 102 and the second area 103, wherein the first adhesive layer 10 and the second adhesive layer 30 are bonded in the first area and wrap the side face, facing the first area 102, of the phase difference film layer 20.
Specifically, the display module comprises a display panel 200, a second adhesive layer 30, a phase difference film layer 20 and a first adhesive layer 10 which are stacked from bottom to top. Compared with the prior art, in the display module of the embodiment, the phase difference film around the slot is surrounded by the first adhesive layer 10 and the second adhesive layer 30, and the phase difference film around the hole region and the OCR filling the hole region are isolated by the first adhesive layer 10 and the second adhesive layer 30 in the first region 102, so that the phase difference film around the slot region of the circular polarizer can be effectively prevented from being corroded by the OCR, crazing of the phase difference film into large visible cracks caused by die cutting can not be caused, and the performance of the display module is further improved.
In one embodiment of the present application, the display panel 200 includes a first display region 201 and a functional region 202, the display region 201 at least partially surrounds the functional region 202, wherein the hole region 101 of the circular polarizer 100 is located in the functional region 202 in the orthographic projection of the display panel 200, and the external light passes through the hole region 101 and then irradiates the lower side of the display panel 200. Specifically, a photosensitive element under the screen is arranged below the functional region 202, and the photosensitive element under the screen may be a camera, an ambient light sensor, a distance sensor, or the like. The functional area 202 is a transparent display area, and the transparent display area can display a picture as a normal display area and also can allow external light to penetrate through, so that the camera under the screen acquires external light to realize a photographing function.
In order to reduce the optical influence caused by the thickness difference between the hole region and other regions of the circular polarizer, in an embodiment of the display module described herein, a transparent filler is further disposed in the hole region 101. Optionally, the transparent filler is OCR, and light transmittance of the functional region is not reduced by OCR.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A circular polarizer, characterized in that it has an aperture area (101), a first area (102), and a second area (103), the first area (102) at least partially surrounding the aperture area (101), the second area (103) at least partially surrounding the first area (102),
the circular polarizer comprises a first adhesive layer (10), a phase difference film layer (20) and a second adhesive layer (30) which are sequentially laminated,
the first adhesive layer (10) and the second adhesive layer (30) being located in a first region (102) and a second region (103),
the phase difference film layer (20) is located in the second region (103), and a side of the phase difference film layer (20) facing the first region (102) is covered by at least one of the first adhesive layer (10) and the second adhesive layer (30).
2. A circular polarizer according to claim 1, characterized in that the first adhesive layer (10) and the second adhesive layer (30) are bonded in a first region and cover the side of the retardation film layer (20) facing the first region (102).
3. The circular polarizer according to claim 1, wherein the phase difference film layer (20) comprises a first sub phase difference film layer (21) and a second sub phase difference film layer (22);
a third adhesive layer (40) is arranged between the first sub-phase difference film layer (21) and the second sub-phase difference film layer (22),
the first adhesive layer (10), the second adhesive layer (30) and the third adhesive layer (40) coat the side faces, facing the first region (102), of the first sub-phase difference film layer (21) and the side faces, facing the second sub-phase difference film layer (22), of the second sub-phase difference film layer.
4. Circular polarizer according to claim 1 or 3, characterized in that the first adhesive layer (10) and/or the second adhesive layer (30) and/or the third adhesive layer (40) is a pressure sensitive adhesive layer.
5. The circular polarizer according to claim 4, further comprising a polarizing functional layer (50),
the polarized light functional layer (50) is positioned on one side of the first adhesive layer (10) far away from the phase difference film layer (20).
6. The circular polarizer according to claim 5, further comprising a surface hardening layer (60),
the surface hardening layer (60) is positioned on one side of the polarization function layer (50) far away from the first adhesive layer (10).
7. The circular polarizer according to claim 6, further comprising a protective film (70) and/or a release film (80),
the protective film (70) is positioned on one side of the surface hardening layer (60) far away from the polarized functional layer (50),
the release film (80) is positioned on one side of the second adhesive layer (30) far away from the phase difference film layer (20).
8. A display module comprising a display panel (200) and the circular polarizer (100) of any of claims 1 to 6, wherein the circular polarizer (100) is located at the light exit side of the display panel (200),
the display panel (200) comprising a first display area (201) and a functional area (202), the display area (201) at least partially surrounding the functional area (202),
wherein the orthographic projection of the hole area (101) of the circular polarizer (100) on the display panel (200) is positioned in the functional area (202).
9. The display module according to claim 8, wherein a transparent filler is disposed in the hole region (101).
10. The display module of claim 9, wherein the transparent filler is OCR.
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| CN202121389888.4U CN215180981U (en) | 2021-06-22 | 2021-06-22 | Circular polarizer and display module |
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| CN202121389888.4U CN215180981U (en) | 2021-06-22 | 2021-06-22 | Circular polarizer and display module |
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